Shutters Open

Shutters Closed

Chain wheel below fantail.

Cranbrook Union Mill has patent sweeps with moveable shutters, operated by a chain which hangs down to the staging from the rear of the cap. When the chain wheel turns, a rack and pinion gear moves a pushrod through the hollow windshaft to operate the spider, thus opening or closing the shutters.

See the FANTAIL.     Go inside the CAP.     OR click on the mill diagram.